Bitdeer SealMiner A4 Pro Hydro (680TH)

The Bitdeer SealMiner A4 Pro Hydro is Bitdeer's mid tier hydro cooled SHA-256 Bitcoin miner, launched April 7, 2026 by Bitdeer Technologies Group (NASDAQ: BTDR) as part of the A4 series. 680 TH/s SHA-256 at 7,412W continuous power draw and 10.9 J/TH efficiency. ±10 percent hashrate tolerance (real world output 612 to 748 TH/s) and ±5 percent power efficiency tolerance per Bitdeer documentation. 2U rack mount chassis at 482 x 665 x 86 mm and 20.5 kg. 380 to 480V three phase AC input with up to 97 percent PSU efficiency. Ethernet 10/100M management. SEAL04 chip platform. The A4 Pro Hydro runs the same fourth generation SEAL04 proprietary chip as the A4 Ultra Hydro flagship, differentiated by chip binning. The Ultra Hydro uses best binned silicon hitting 9.45 J/TH at 886 TH/s; the Pro Hydro uses standard grade silicon from the same production process, delivering 10.9 J/TH at 680 TH/s from the same chip architecture. Similar to the Bitmain S23 / S23 Pro or L11 / L11 Pro binning relationships. For operators wanting SEAL04 generation architecture at lower capital cost per unit, the Pro Hydro represents the accessible entry into Bitdeer's A4 platform. Generational efficiency progression. SEAL02 (A2 family) at 14.9 to 16.5 J/TH, SEAL03 (A3 family) at 12.5 to 13.5 J/TH, SEAL04 (A4 family) at 9.45 to 10.9 J/TH. The A4 Pro Hydro at 10.9 J/TH represents approximately 13 percent better efficiency than the A3 Pro Hydro predecessor (660 TH/s at 12.5 J/TH) at nearly identical hashrate per unit, typical of single generation chip advancement. Competitive Bitcoin hydro landscape at the 600 to 700 TH/s hashrate tier. Bitmain S23 Hydro (580 TH/s at 9.5 J/TH) leads efficiency at slightly lower hashrate per unit. Bitdeer A3 Pro Hydro (660 TH/s at 12.5 J/TH) delivers similar hashrate with 15 percent worse efficiency. Bitdeer A4 Pro Hydro (680 TH/s at 10.9 J/TH) sits between these on both metrics. For Bitdeer ecosystem operators prioritizing newest chip architecture and drop in rack compatibility with existing A2/A3 infrastructure, the A4 Pro Hydro represents the natural fleet refresh path at mid tier acquisition cost. Drop in hydro rack compatibility. All Bitdeer hydro models (A2 Pro Hydro, A3 Hydro, A3 Pro Hydro, A4 Pro Hydro, A4 Ultra Hydro) share the same 482 x 665 x 86 mm 2U chassis with matching water cooling inlet and outlet configurations. Operators with existing Bitdeer hydro deployments can refresh individual rack slots with A4 Pro Hydro units without plumbing reconfiguration. 21 A4 Pro Hydro units fit per 42U rack producing approximately 14.3 PH/s aggregate at approximately 156 kW continuous power draw per rack.Power infrastructure. 380 to 480V three phase industrial AC input at approximately 12 to 13 amps per phase at 480V continuous. Up to 97 percent PSU efficiency reduces facility electrical losses by approximately 3 to 5 percent versus typical 92 to 94 percent industrial PSU tiers. Frequency range 47 to 63 Hz. Not compatible with residential or most single phase commercial service.External hydro cooling infrastructure required. Unlike integrated all in one hydro designs, the A4 Pro Hydro connects to external facility CDU, dry cooler or chiller, heat exchanger, pumps, and plumbing. Each unit generates approximately 7.4 kW thermal load (25,245 BTU per hour) requiring cooling loop capacity sized for fleet scale. For facilities without existing hydro infrastructure, the A4 Pro Air (336 TH/s at 10.9 J/TH) represents the Bitdeer alternative without hydro requirement. Physical and environmental specifications. 20 to 55 degrees Celsius ambient operating range per Bitdeer A4 hydro specification. The 20 degree minimum reflects hydro cooling's condensation dew point requirement. Maximum 55 degrees Celsius ambient sits above typical air cooled ASIC tolerance since hydro cooling handles peak chip thermal load independently of facility air temperature. 50 dB chassis noise from liquid to chip cooling, with external cooling infrastructure generating separate acoustic signature depending on CDU and dry cooler specifications. Mines Bitcoin (BTC) as primary network, plus Bitcoin Cash (BCH) and Bitcoin SV (BSV) through SHA-256 algorithm. Ships with PSU, three phase power cable, quick start guide, 6 month Bitdeer factory warranty, and free DDP worldwide delivery from MillionMiner.